<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>类字段声明</title>
</head>

<body>

    <script>
        class Car {
            color = 'blue';
            age = 2;
        }
        const car = new Car();
        console.log(car.color); // blue
        console.log(car.age); // 2
    </script>
</body>

</html>